MCD1-24HRFN1-MT0W(GA) 
Indoor unit EEPROM parameter error 
Indoor / outdoor unit communication error 
The  indoor  fan  speed  is  operating  outside  of  the  normal 
range(for some models) 
Indoor  room  temperature  sensor  T1  is  in  open  circuit  or  has 
short circuited 
Evaporator coil temperature sensor T2 is in open circuit or has 
short circuited 
Refrigerant Leakage Detection(for some models) 
Water-level alarm malfunction 
Outdoor room temperature sensor T4 is in  open circuit or  has 
short circuited 
Condenser coil temperature sensor T3 is in open circuit or has 
short circuited 
Compressor discharge temperature sensor TP is in open circuit 
or has short circuited 
Evaporator coil outlet temperature sensor T2B is in open circuit 
or has short circuited(for free-match indoor units) 
Outdoor unit EEPROM parameter error 
The  outdoor  fan  speed  is  operating  outside  of  the  normal 
range(for some models) 
IPM malfunction or IGBT over-strong current protection 
Over voltage or over low voltage protection 
Top temperature protection of compressor or High temperature 
protection of IPM module 
Inverter compressor drive error 
High  pressure protection or  low  pressure protection  (for some 
models) 
Indoor units mode conflict(match with multi outdoor unit)